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Author Topic: How to change to a bigger Mapsensor?  (Read 42637 times)
nyet
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« Reply #30 on: May 13, 2011, 12:16:01 PM »

Yea, neither DSLGRAD or DLSOFS will help us here.
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julex
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« Reply #31 on: May 13, 2011, 01:33:56 PM »

Yea, neither DSLGRAD or DLSOFS will help us here.

So long Tony can build in an adjustable multiplier into his data logger so that we can see real boost when logging, running underscaled MAP sensor sounds doable so long you adjust few things here and there.

I can't wait to have ACTUAL ECU controlled PID on ove 23psi of boost car instead of hardwiring N75 into boost tables.
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Aurélien
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« Reply #32 on: July 04, 2011, 04:40:34 AM »

The good point of getting a bigger underscaled sensor is that you can run +2550 mbar of boost with PID tuning... Smiley

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elRey
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« Reply #33 on: May 15, 2012, 06:33:35 PM »

So, let's roll up our sleeves and list EVERY single map/axis that needs to be rescaled.

What is the 1013 constant I see being divided into pressure variables?
Edit: 1013 = 1 ATM in mbar/hPA. These constants need to be found and  modify with new scale also. Fun.

request manifold pressure conversion:
fpbrkds_w
via
KFPBRK
KFPBRKNW

actual pressure conversion:
DSLGRAD
DLSOFS

ambient pressure conversion:
DSUGRAD
DSUOFS

referencing maps/axis (here's where is work begins):
a factor needs to be figured out first from the modification above

group by referenced variable

PU/PU_W (ambient):
PUMN
PUMX
PUSPSMX
PUE
DPUPVDK
FHOE ?
...

pvdks_w/pvdkdsl_w/pvdkds/pvdkmx_w/fpvdkdsl_w/pvdkspud (actual pressure):
PVDKMX
PVDKMN
PVDKPSMX
DPDSVLU
PVDKPUD
KVLAD
LADFIL ?
FPVMXN2
PBKVVSTGPV
...
ps_s/pssol_w/plsol_w/plsol (requested manifold pressure):
KFLDFK
PSPVDKUG
KLAF
...

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Rick
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« Reply #34 on: May 19, 2012, 04:25:29 PM »

There really is no need to bastardise the scaling, the std sensor is fine, you just need to have external logging.
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elRey
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« Reply #35 on: May 19, 2012, 04:39:10 PM »

There really is no need to bastardise the scaling, the std sensor is fine, you just need to have external logging.

bastardise?  i would think this would be how bosch does it for cars equipped with 3bar+ sensors. the overall scale is adjusted to match sensor. FF no longer = 2560. FF = 30xx mbar and thus every bit from 00 to FF represents a larger hPa value and requiring every map that references hPa to be rescaled or axis rescaled. No?

what if you want DV control for pressures above 2560?

« Last Edit: May 19, 2012, 09:20:13 PM by elRey » Logged
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